It’s all a part of the hunt. Luckily I don’t have to hunt for food I’d probably be a pretty hungry guy. Even if I took what I could from the land I think I’d fall short most of the year .
Where I am it’s the sea that has the most food readily available. All sorts of easy things to find and eat . The plants here would be a struggle to survive off without serious knowledge of what to get and how to get it. And well in a survival setting hunting would be an option too just because of native animals that we don’t hunt but you would in a private or survivor scenario.

The sling shines in some areas and not in others. Like most weapons they have advantages and disadvantages. You’re totally right, a sling is not gonna be as easy to be successful with. This is a given. But this doesn’t totally mean it’s not effective. Most your issues are associated with the accuracy and the movement required to take a shot. And really both come down to the user in some way. Accuracy is just a combination of practice and good equipment choices. But the equipment only gets you so far , this is the issue, the sling doesn’t give an easy answer to accuracy. Bows ,guns , blowguns, slingshots even an atlatl has some directional aiming to it. So it really is a much harder tool to learn.

Now that being said you can be accurate with a sling . But how accurate and how consistent is debatable. Given the small number of people who actually show their accuracy with slings and the community itself being very small it can be said that really we all just suck and the limits of slinging have not been reached . I know I’m personally doing things I thought I would never do with a sling but the progression is long and unknown. You think something is impossible until you do something that you didn’t think was possible. We honestly might all be like children in context to how good slingers have been in the past.

The movement thing just comes down to understanding the whole hunt. You don’t just draw your bow any time , or walk whenever you want. The whole process you can get caught out . Doesn’t really matter on the equipment. Yes a sling requires more movement but that might need to be incorporated into the gameplan.

All in all your right to not want to hunt with a sling. It’s definitely not a thing to be taken lightly. It’s a big commitment if that’s a goal of your own.

You also have to consider the possibility that game was more plentiful in the wild in the past (in some places). If you missed or spooked the animal… that’s a bummer, but that doesn’t mean you starve. Maybe you only get a kill on 1/5 shots… That means that if you have an opportunity to take at least 5 shots in a day… you probably get to eat that day.